A bunch of pop stars have teamed up to cover 'God Only Knows' by the Beach Boys

All your favourite pop stars on one song.

To celebrate the launch of BBC Music - "an ambitious wave of new programmes, innovative partnerships and ground-breaking music initiatives that amount to the BBC's strongest commitment to music in 30 years" - the BBC have done a "perfect day" again - this time covering the Beach Boys' 'God Only Knows'.